Already renewed for a second season, AMC has described Better Call Saul as follows:

The series is set six years before Saul Goodman meets Walter White. When we meet him, the man who will become Saul Goodman is known as Jimmy McGill, a small-time lawyer searching for his destiny, and, more immediately, hustling to make ends meet. Working alongside, and, often, against Jimmy, is "fixer" Mike Ehrmantraut, a beloved character introduced in Breaking Bad. The series will track Jimmy's transformation into Saul Goodman, the man who puts "criminal" in "Criminal lawyer." The series' tone is dramatic, woven with dark humor.

During the Television Critics Association press tour, Better Call Saul co-showrunner Peter Gould revealed that the Breaking Bad prequel has no immediate plans to include Bryan Cranston or Aaron Paul's characters.

However, that doesn't mean that viewers cannot get a glimpse of their favourite meth dealers in the upcoming seasons.

Gould and co-showrunner (and Breaking Bad creator) Vince Gilligan said that Walter and Jesse could show up at some point in the spinoff, if the story and timing feel right.

"[I'm] not saying it's never going to happen," Gould clarified, while Gilligan added, "Our intention and our hope is that it will feel proper and organic. If it feels like a stunt, then we in the writer's room will feel like we have done something wrong."